Impeller welding tool

Abstract

The utility model discloses an impeller welding tool which is used for welding the upper ends and the lower ends of a plurality of blades with an upper hub and a lower hub respectively, and comprises a rack, a rotating motor arranged on the rack, a rotating disc driven by the rotating motor and used for bearing the lower hub, a blade fixing assembly and a pressing disc. The blade fixing assembly comprises two circular chucks which are arranged at an interval and connected together through a bolt rod, and a plurality of bayonets matched with the bending angle of the blade are distributed on the edge of each chuck at intervals; the upper end and the lower end of the pressing disc are open, and a profiling cavity matched with the outer contour of the upper hub is formed in the pressing disc. In the assembling process, the blade fixing assembly, the lower hub and the rotating disc are fixed together from top to bottom, after the blades are inserted into the corresponding bayonets respectively, the lower end faces of the blades are attached to the upper surface of the lower hub, the upper hub is placed on a supporting face formed by the upper end faces of all the blades, and the pressing disc is clamped to the upper hub. The tool is convenient to operate and high in machining efficiency and machining precision.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to an impeller welding tool. Background Art

[0002] The fan is a machine that uses mechanical energy to increase the gas pressure and then transport the gas out. It is one of the four major parts in the dust removal and ventilation system. Among them, the impeller is the core component of the fan. Common impellers are cast or welded, such as Fig.13 , Fig.14 , Fig.15 as well as Fig.16 As shown, the impeller 3 is made of an upper hub 7, a plurality of blades 6, and a lower hub 8 through welding.

[0003] In actual welding production, the blades are positioned by manually marking on the upper and lower hubs. When welding the blades to the lower hub, since the blades are not fixed, they will be offset and misplaced, affecting the welding quality, and manual secondary adjustments are required. However, due to the large number of blades, it takes a long time to correct, which slows down the welding speed. In addition, when welding the blades to the upper hub, after the bottom surface of the upper hub fits with the arc surface of the upper end of the blade, the upper hub uses its own weight to automatically align. However, if the upper hub is made of a lighter material, the upper hub is prone to displacement at the beginning of welding, and timely adjustment is required, which is time-consuming and laborious. Utility Model Content

[0004] The utility model aims to provide an impeller welding tool, which can avoid biased welding during the welding process of a lower hub, an upper hub and a plurality of blades, and is easy to operate and highly efficient.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] An impeller welding tool is used to weld the upper and lower ends of multiple blades to an upper hub and a lower hub respectively, comprising a frame, a rotating motor arranged on the frame, a turntable driven by the rotating motor to carry the lower hub, a blade fixing assembly and a pressure plate; the blade fixing assembly comprises two circular chucks arranged at intervals and connected together by bolt rods, and a plurality of bayonet holes adapted to the bending angle of the blades are distributed at intervals on the edge of each chuck; the upper and lower ends of the pressure plate are open, and a contoured cavity adapted to the outer contour of the upper hub is provided inside; during assembly, the blade fixing assembly, the lower hub and the turntable are fixed together from top to bottom, and after the blades are respectively inserted into the corresponding bayonet holes, the lower end faces of the blades are abutted against the upper surface of the lower hub, the upper hub is placed on the supporting surface formed by the upper end faces of all the blades, and the pressure plate is clamped onto the upper hub.

[0007] By adopting the above technical solution, the blade fixing assembly, the lower hub and the turntable are fixed together, the blade is clamped in the bayonet of the blade fixing assembly, the upper hub is pressed on the upper end surface of the blade, and the pressure plate is clamped on the upper hub, ensuring that there is no biased welding during the welding process. Moreover, the blades are respectively clamped in the bayonet of the blade fixing assembly, realizing the rapid clamping of the blades. The operation is convenient and efficient.

[0008] As a further solution of the utility model: the pressure plate includes a circular disc and a boss located on the upper surface of the circular disc, and a plurality of angle plates are spaced apart on the edge of the circular disc.

[0009] As a further solution of the utility model: a fixing piece for fixing the upper wheel hub is provided on the pressure plate.

[0010] As a further solution of the utility model: the fixing member is a plurality of U-shaped plates spaced apart on the upper edge of the boss, a threaded hole is formed on the outer vertical portion of each U-shaped plate, and a locking screw is provided in the threaded hole.

[0011] As a further solution of the utility model: the blade fixing assembly is provided with a limiting member for limiting the upper hub.

[0012] As a further solution of the utility model: the limiting members are two cylindrical pins, and the edges of the upper chuck of the blade fixing assembly are symmetrically provided with positioning holes. During assembly, the pressure plate is clamped on the upper hub, and the two cylindrical pins are respectively installed in the corresponding positioning holes and abut against the inner wall of the upper hub.

[0013] As a further solution of the utility model: a pair of handles are provided on the upper surface of the disc.

[0014] As a further solution of the utility model: the turntable, the lower hub and the blade fixing assembly are connected and fixed together by a fastening assembly.

[0015] As a further solution of the utility model: the fastening assembly includes a plurality of bolts and a plurality of butterfly nuts arranged on the upper surface of the turntable, the position corresponding to the bolt on the lower hub is provided with a first through hole, and the position corresponding to the bolt on the chuck of the blade fixing assembly is provided with a second through hole. During assembly, the lower hub is placed on the turntable, and the blade fixing assembly is placed on the lower hub. The end of the bolt passes through the corresponding first through hole, comes out from the corresponding second through hole, and is connected to the corresponding butterfly nut, thereby fixing the lower hub and the blade fixing assembly on the turntable.

[0016] As a further solution of the utility model: the frame is provided with an angle adjustment mechanism for adjusting the angle of the rotating motor.

[0017] As a further solution of the utility model: the angle adjustment mechanism includes a motor bracket and a long positioning pin, the motor bracket is hinged to the upper part of the frame, a first positioning hole is opened at the rear part of the motor bracket, a second positioning hole is provided at the horizontal part of the frame corresponding to the position of the first positioning hole, and a third positioning hole is provided at the vertical part of the frame corresponding to the position of the first positioning hole. The rotating motor is fixed on the motor bracket. When in use, the motor bracket is in a horizontal state, the first positioning hole coincides with the second positioning hole, and the long positioning pin is inserted into the first positioning hole and the second positioning hole to form a first usage state; the motor bracket is flipped upward to a vertical state, the first positioning hole coincides with the third positioning hole, and the long positioning pin is inserted into the first positioning hole and the third positioning hole to form a second usage state.

[0018] In summary, in the utility model, the turntable, the lower hub and the blade fixing assembly are first fixed together by a fastening assembly. All blades are respectively inserted into the bayonet of the blade fixing assembly, which not only enables the blades to be quickly clamped, but also fixes the positions of all blades, thereby preventing the blades from being welded off-center during the welding process. By pressing the pressure plate onto the upper hub, a limiting piece is provided on the blade fixing assembly, the upper hub is pressed and limited, ensuring that the upper hub and the blades will not be welded off-center during welding. The tooling is easy to operate, has high processing efficiency and high processing precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings.

[0020] Figure 1 This is a structural schematic diagram of an impeller welding tooling of the utility model;

[0021] Figure 2 The figure shows that the rotating motor is mounted on the motor bracket, and the mounting plate is fixed to the output end of the rotating motor;

[0022] Figure 3 It is a structural schematic diagram of the blade fixing assembly of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the pressure plate of the utility model;

[0024] Figure 5 is showing the lower hub placed on the turntable;

[0025] Figure 6 It shows that the rotating disk, the lower hub and the blade fixing assembly are connected and fixed together by a fastening assembly;

[0026] Figure 7 The blade is shown to be clamped in the corresponding bayonet;

[0027] Figure 8 The figure shows the upper hub being placed on the upper end surface of the blade;

[0028] Fig. 9 is showing the clamping of the pressure plate onto the upper wheel hub;

[0029] Fig.10 It shows that two cylindrical pins are respectively installed in corresponding positioning holes and their circumferential surfaces are in contact with the inner wall of the convex ring of the upper hub;

[0030] Fig.11 The motor bracket is shown in a vertical state, the first positioning hole coincides with the third positioning hole, and the long positioning pin is inserted into the first positioning hole and the third positioning hole to form a second use state;

[0031] Fig.12 The motor bracket is shown in a horizontal state, the first positioning hole coincides with the second positioning hole, and the long positioning pin is inserted into the first positioning hole and the second positioning hole to form a first use state;

[0032] Fig.13 It is a structural schematic diagram of the upper hub of the utility model;

[0033] Fig.14 It is a structural schematic diagram of the blade of the utility model;

[0034] Fig.15 It is a structural schematic diagram of the lower wheel hub of the utility model;

[0035] Fig.16 It is a structural schematic diagram of the impeller of the utility model. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] See also Figure 1 and Figure 2 As shown, the utility model is an impeller welding tool, which is used to weld the upper and lower end surfaces of multiple blades 6 to the upper hub 7 and the lower hub 8 respectively. The welding tool includes a frame 10, a rotating motor 11 arranged on the frame 10, a rotating plate 9 driven by the rotating motor 11 to carry the lower hub 8, a blade fixing assembly 20 and a pressure plate 30.

[0038] like Figure 3 and Figure 7As shown, the blade fixing assembly 20 includes two circular chucks 22 of the same structure that are spaced apart and connected together by bolt rods 21. A plurality of bayonet holes 23 that are adapted to the bending angle of the blade 6 are spaced apart on the edge of each chuck 22. During assembly, the blades are inserted into the corresponding bayonet holes 23 in sequence. Here, the welding requirements of blades 6 of different sizes can be met by replacing bolt rods 21 of different lengths.

[0039] like Figure 5 and Figure 6 As shown, in addition, the turntable 9, the lower hub 8 and the blade fixing assembly 20 are connected and fixed together by a fastening assembly 40.

[0040] like Figure 3 , Figure 5 and Figure 6 As shown, in this embodiment, the fastening assembly 40 includes a plurality of bolts 41 and a plurality of butterfly nuts 42 arranged on the upper surface of the turntable 9. The plurality of bolts 41 are distributed on a circle with the center of the turntable 9 as the center. A first through hole 43 is provided at a position corresponding to the bolt on the lower hub 8. A second through hole 44 is provided at a position corresponding to the bolt 41 on the chuck 22 of the blade fixing assembly 20. During assembly, the lower hub 8 is first placed on the upper surface of the turntable 9, and then the blade fixing assembly 20 is placed on the upper surface of the lower hub 8. The end of the bolt 41 passes through the corresponding first through hole 43, passes through the corresponding second through hole 44, and is threadedly connected with the corresponding butterfly nut 42, thereby fixing the lower hub 8 and the blade fixing assembly 20 on the turntable 9.

[0041] like Figure 4 As shown, the pressure plate 30 includes a disc 31 and an integrally formed boss 32 located on the upper surface of the disc 31. The upper and lower ends of the pressure plate 30 are open, and the inner portion has a contoured cavity 33 adapted to the outer contour of the upper wheel hub 7. A plurality of angle plates 34 are arranged at intervals on the edge of the disc 31. In this way, the pressure plate 30 is clamped on the upper wheel hub 7, and the plurality of angle plates 34 can limit the upper wheel hub 7. A pair of handles 39 are provided on the upper surface of the disc 31.

[0042] like Figure 4 , Figure 8 and Fig. 9As shown, a fixing member for fixing the upper wheel hub 7 is also provided on the pressure plate 30. In this embodiment, the fixing member is a U-shaped plate 35. A plurality of positioning steps 36 are arranged at intervals on the upper part of the circumference of the boss 32. The plurality of U-shaped plates 35 are respectively clamped on the corresponding positioning steps 36, the inner surface of the outer vertical portion of each U-shaped plate 35 is in contact with the vertical outer side surface of the positioning step 36, the inner surface of the horizontal portion is in contact with the top surface of the boss 32, the inner vertical portion is located in the profiling cavity 33, and there is a gap between the inner side surface and the inner wall of the profiling cavity 33. Among them, a through threaded hole 37 is opened on the outer vertical portion of the U-shaped plate 35, and a locking screw 38 is provided in the threaded hole 37. When in use, the pressure plate 30 is clamped on the upper hub 7, and the convex ring 701 of the upper hub 7 is located in the gap between the inner wall of the contour cavity 33 and the inner surface of the inner vertical portion of the U-shaped plate 35. Then, all the locking screws 38 are tightened to fix the upper hub 7.

[0043] A limiting member for limiting the position of the upper hub is provided on the blade fixing assembly 20 .

[0044] like Figure 3 and Fig.10 As shown, in this embodiment, the limiting members are two cylindrical pins 5. Positioning holes 4 are symmetrically provided on the edge of the upper chuck 22 of the blade fixing assembly 20. During assembly, the pressure plate 9 is clamped on the upper hub 7, and then the two cylindrical pins 5 are respectively installed in the corresponding positioning holes 4 and the circumferential surfaces are in contact with the inner wall of the upper hub 7, so as to stop and limit the upper hub 7.

[0045] like Figure 1 As shown, an angle adjustment mechanism 50 for adjusting the angle of the rotating motor 11 is provided on the frame 10 .

[0046] like Fig.10 , Fig.11 and Fig.12 As shown, in this embodiment, the angle adjustment mechanism 50 includes a motor bracket 51 and a long positioning pin 52. The middle part of the motor bracket 51 is hinged to the upper part of the frame 10 through a rotating shaft. A through first positioning hole 53 is opened at the rear of the motor bracket 51. A through second positioning hole 54 is provided at a position corresponding to the first positioning hole 53 on the horizontal part of the frame 10. A through third positioning hole 55 is provided at a position corresponding to the first positioning hole 53 on the vertical part of the frame 10. The rotating motor 11 is fixed to the motor bracket 51. When in use, the motor bracket 51 is in a horizontal state, the first positioning hole 53 coincides with the second positioning hole 54, and the long positioning pin 52 is inserted into the first positioning hole 53 and the second positioning hole 54 to form a first use state; the motor bracket 51 is turned upward to a vertical state, the first positioning hole 53 coincides with the third positioning hole 55, and the long positioning pin 52 is inserted into the first positioning hole 53 and the third positioning hole 55 to form a second use state.

[0047] When working, if Figure 2As shown, first install the rotating motor 11 on the motor bracket 51, and fix the mounting plate 9 to the output end of the rotating motor 11. Figure 5 and Figure 6 As shown, the blade fixing assembly 20, the lower hub 8 and the rotating disk 9 are then fixed together in sequence. Figure 7 As shown, then, all blades 6 are inserted into the corresponding bayonet 23. It should be noted that the lower end surface 601 of the blade 6 is a horizontal surface that fits the upper surface of the lower hub 8, and the upper end surface of the blade 6 has an inclined plane 602 and an inclined arc surface 603, and the connection between the inclined plane 602 and the inclined arc surface 603 is a rounded transition. Figure 8 As shown, the upper hub 7 is placed on the support surface formed by the inclined planes 602 of all blades 6, and the inclined arc surface 603 of the blade 6 fits with the inner wall of the convex ring 701 of the upper hub 7. Fig. 9 As shown, the pressure plate 9 is then clamped onto the upper wheel hub 7 and fixed by a fixing member. Fig.10 As shown, after that, two cylindrical pins 5 are respectively installed in the corresponding positioning holes 4 and the circumferential surfaces are in contact with the inner wall of the convex ring 701 of the upper hub 7 to limit the upper hub 7. Fig.11 As shown, the motor bracket 51 is then installed on the frame 10. At this time, the motor bracket 51 is in a vertical state, the first positioning hole 53 coincides with the third positioning hole 55, and the long positioning pin 52 is inserted into the first positioning hole 53 and the third positioning hole 55 to form a second use state. Subsequently, a welding robot (not shown in the figure) first welds the inclined arc surface 603 of a blade 6 to the inner wall of the convex ring 701 of the upper hub 7 to prevent the upper hub 7 from shifting. Subsequently, the two cylindrical pins 5 are removed to prevent interference with subsequent welding. Afterwards, the rotary motor 11 rotates, and the welding machine sequentially welds the inclined arc surfaces 603 of the remaining blades 6 to the inner wall of the convex ring 701 of the upper hub 7. Fig.12 As shown, thereafter, the long positioning pin 52 is removed, the motor bracket 51 is flipped over to a horizontal state, the first positioning hole 53 coincides with the second positioning hole 54, and the long positioning pin 52 is inserted into the first positioning hole 53 and the second positioning hole 54 to form a first use state. Subsequently, the rotary motor 11 rotates, and the welding robot sequentially welds the inclined planes 602 of all blades 6 to the bottom surface of the upper hub 7, and welds the lower end surfaces 601 of all blades 6 to the upper surface of the lower hub 8, thereby completing the impeller welding.

[0048] In summary, in the utility model, the turntable, the lower hub and the blade fixing assembly are first fixed together by a fastening assembly. All blades are respectively inserted into the bayonet of the blade fixing assembly, which not only enables the blades to be quickly clamped, but also fixes the positions of all blades, thereby preventing the blades from being welded off-center during the welding process. By pressing the pressure plate onto the upper hub, a limiter is provided on the blade fixing assembly, and the upper hub is limited, ensuring that the upper hub and the blades will not be welded off-center during welding. The tooling is easy to operate, has high processing efficiency, and high processing accuracy.

[0049] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. An impeller welding tool, used to weld the upper and lower ends of a plurality of blades to an upper hub and a lower hub respectively, characterized in that: It includes a frame, a rotating motor arranged on the frame, a turntable driven by the rotating motor for carrying the lower hub, a blade fixing assembly and a pressure plate; the blade fixing assembly includes two circular chucks arranged at intervals and connected together by bolt rods, and a plurality of bayonet holes adapted to the bending angle of the blades are distributed at intervals on the edge of each chuck; the upper and lower ends of the pressure plate are open, and the interior has a contoured cavity adapted to the outer contour of the upper hub; when assembling, the blade fixing assembly, the lower hub and the turntable are fixed together from top to bottom, and after the blades are respectively inserted into the corresponding bayonet holes, the lower end faces of the blades are attached to the upper surface of the lower hub, and the upper hub is placed on the supporting surface formed by the upper end faces of all the blades, and the pressure plate is clamped onto the upper hub.

2. The impeller welding tool according to claim 1, characterized in that: The pressure plate comprises a circular plate and a boss located on the upper surface of the circular plate, and a plurality of angle plates are distributed at intervals on the edge of the circular plate.

3. The impeller welding tool according to claim 2, characterized in that: The pressure plate is provided with a fixing piece for fixing the upper wheel hub.

4. The impeller welding tool according to claim 3, characterized in that: The fixing member is a plurality of U-shaped plates spaced apart on the upper edge of the boss, a threaded hole is formed on the outer vertical portion of each U-shaped plate, and a locking screw is disposed in the threaded hole.

5. The impeller welding tool according to claim 1, characterized in that: The blade fixing assembly is provided with a limiting piece for limiting the position of the upper hub.

6. The impeller welding tool according to claim 5, characterized in that: The limiting parts are two cylindrical pins, and positioning holes are symmetrically arranged on the edge of the upper chuck of the blade fixing assembly. During assembly, the pressure plate is clamped on the upper hub, and the two cylindrical pins are respectively installed in the corresponding positioning holes and abut against the inner wall of the upper hub.

7. The impeller welding tool according to claim 1, characterized in that: The rotating disk, the lower hub and the blade fixing assembly are connected and fixed together through a fastening assembly.

8. The impeller welding tool according to claim 7, characterized in that: The fastening assembly includes a plurality of bolts and a plurality of butterfly nuts arranged on the upper surface of the turntable, a first through hole is provided at a position corresponding to the bolt on the lower hub, and a second through hole is provided at a position corresponding to the bolt on the chuck of the blade fixing assembly. During assembly, the lower hub is placed on the turntable, and the blade fixing assembly is placed on the lower hub. The end of the bolt passes through the corresponding first through hole, comes out from the corresponding second through hole, and is connected to the corresponding butterfly nut, thereby fixing the lower hub and the blade fixing assembly on the turntable.

9. The impeller welding tool according to claim 1, characterized in that: The frame is provided with an angle adjustment mechanism for adjusting the angle of the rotating motor.

10. The impeller welding tool according to claim 9, characterized in that: The angle adjustment mechanism includes a motor bracket and a long positioning pin, the motor bracket is hinged to the upper part of the frame, a first positioning hole is opened at the rear part of the motor bracket, a second positioning hole is provided at the horizontal part of the frame corresponding to the position of the first positioning hole, and a third positioning hole is provided at the vertical part of the frame corresponding to the position of the first positioning hole. The rotating motor is fixed on the motor bracket. When in use, the motor bracket is in a horizontal state, the first positioning hole coincides with the second positioning hole, and the long positioning pin is inserted into the first positioning hole and the second positioning hole to form a first use state; the motor bracket is flipped upward to a vertical state, the first positioning hole coincides with the third positioning hole, and the long positioning pin is inserted into the first positioning hole and the third positioning hole to form a second use state.

Images